The economy of Australia is one of the largest mixed market economies in the world, with a GDP of AUD$1.62 trillion as of 2015.[20] Australia's total wealth is AUD$6.4 trillion in 2013.[21] In 2012, it was the 12th largest national economy by nominal GDP[22] and the 17th-largest measured by PPP-adjusted GDP, about 1.7% of the world economy. Australia is the 19th-largest importer and 19th-largest exporter. The Reserve Bank of Australia publishes quarterly forecasts of the economy.[23]